1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines

ABSTRACT

This invention relates to novel compounds of the isoindolenine series. More particularly, the present invention relates to certain novel 1-imono-3-(4-imino-5-thiazolidinylidene)isoindolines, 1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines, water-insoluble pigments prepared therefrom, and to methods for their preparation.

This application is a continuation-in-part of our prior copendingapplication Ser. No. 564,725, filed Apr. 3, 1975, now U.S. Pat. No.3,993,658, issued Nov. 23, 1976, which in turn is a continuation-in-partof our prior copending application Ser. No. 308,163, filed Nov. 20,1972, now U.S. Pat. No. 3,919,235, issued Nov. 11, 1975.

BACKGROUND OF THE INVENTION

a. Field of the Invention

The invention described herein relates to new and useful compoundsclassified in the art of chemistry as1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines, to valuable metalchelate pigments derived therefrom and to intermediates and processesfor obtaining them.

B. Description of the Prior Art

Metallized organic pigments of widely diverse structural types are knownin the prior art. Among the more important classes of such metallizedpigments may be mentioned, for example, metal chelates of: ortho-hydroxyazo pigments as described in U.S. Pat. No. 1,232,551; azomethine metalcomplex pigments as taught in U.S. Pat. No. 3,687,991; metallizedporphyrin pigments as described in Berichte 60: 2611 (1927) [ChemicalAbstracts 22: 1163 (1928)]; and metallized porphyrazine pigments asdescribed in U.S. Pat. No 2,765,308. The closest related prior artappears to lie in the class of pigments known as metallizedtetrabenzoporphyrazines or metallized phthalocyanines. These compoundsare well known and have been extensively described in Chapter 9 of TheAmerican Chemical Society monograph entitled "The Chemistry of SyntheticDyes and Pigments." edited by H. A. Lubs, Reinhold PublishingCorporation, 430 Park Ave., New York, N.Y. (1955), as well as in manyU.S. patents, particularly those in the Patent Office classification260-314.5 entitled "Phthalocyanines."

There are a number of U.S. patents in the prior art which teach the useof 1,3-diimino-isoindolines as intermediates in the preparation of dyesand pigments. For example, U.S. Pat. No. 3,646,033 teaches theproduction of asymmetrically disubstituted isoindoline dyestuffs.Specifically disclosed therein is the interaction of1,3-diimino-isoindoline and 1-phenyl-3-methyl-5-pyrazolone to form1-[(1'-phenyl-3'-methyl-5'-oxo)-pyrazolidene-4' ]-3-iminoisoindolinewhich, in turn, is further interacted to introduce a second substituentin the 3-position forming a compound useful as a dyestuff.

SUMMARY OF THE INVENTION

In one of its composition of matter aspects, the invention relates tothe novel metal chelate pigments of the formula ##STR1## which areuseful for coloring natural fibers, synthetic fiberforming material andcellulosic materials such as threads, sheets, fibers, filaments, textilefabrics and the like, as well as in the manufacture of paper, varnishes,inks, coatings and plastics.

In a second composition of matter aspect, the invention relates to novel1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines represented by theformula ##STR2##

In one of its process aspects, the invention relates to a process forpreparing the metal chelate pigment final products of Formula I whichcomprises interacting approximately two molecular equivalents of a1-imino-3-(4-imino-5-thiazolidinylidene)isoindoline or1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindoline represented byFormula II, or preferably the zinc halide adduct thereof, withapproximately one molecular equivalent of a metal salt, MeAn₂.

In a second process aspect, the invention sought to be patented residesin the process for preparing the novel1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and 1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines represented by Formula IIwhich comprises interacting in approximately equimolecular proportions1,3-diiminoisoindoline and a 4-iminothiazolidine or a4-imino-2-thiazoline, respectively.

DETAILED DESCRIPTION INCLUSIVE OF THE PREFERRED EMBODIMENTS

More specifically, this invention, in its first composition of matteraspect, resides in the novel metal chelate pigments of the formula##STR3## wherein A is a divalent radical combining with the --C=C--portion of the molecule to which it is attached to form a six-memberedcarbocyclic ring and is selected from the class having the formulas##STR4## wherein each instance C(7) and C(4) are bonded to C(7a) andC(3a) respectively, and in which R, R₁, R₂ and R₃ are the same ordifferent and are selected from the class consisting of hydrogen, alkylhaving one to three carbon atoms, alkoxy having one to three carbonatoms, halo, trifluoromethyl, phenyl and phenyl substituted by alkylhaving one to three carbon atoms, alkoxy having one to three carbonatoms and halogen; Me is a metal selected from the class consisting ofcopper, cobalt and nickel; Y is a divalent radical combining with the--S--C--C-- portion of the molecule to form a five-membered heterocyclicring having the same orientation as a thiazole ring and selected fromthe group consisting of ##STR5## in which Z is NH, O or S, and N=B islower-alkylamino, di-lower-alkylamino, piperidino, pyrrolidino,morpholino, phenylamino, (lower-alkyl)-(phenyl)amino,phenyl-lower-alkylamino or (lower-alkyl)-phenyl-lower-alkyl)amino; andAn is an anion.

Particularly preferred embodiments of the above-described composition ofmatter aspect are as follows:

a. Compounds of Formula I wherein A is ##STR6## and Y is ##STR7## of theformula ##STR8## in which Me, R, R₁, R₂, R₃, Z and An each have the samerespective meanings indicated in relation to Formula I.

b. Compounds of Formula I wherein A is ##STR9## and Y is ##STR10## ofthe formula ##STR11## in which Me, R, R₁, R₂, R₃, N=B and An each havethe same respective meanings indicated in relation to Formula I.

c. Compounds of Formula I wherein A is ##STR12## and Y is ##STR13## ofthe formula ##STR14## in which Me, R, R₁, R₂, R₃ and Z each have thesame respective meanings indicated in relation to Formula I.

d. Compounds of Formula I wherein A is ##STR15## and Y is ##STR16## ofthe formula ##STR17## in which Me, R, R₁, R₂, R₃ and N=B each have thesame respective meanings indicated in relation to Formula I. light

The compounds of Formula I (and Formulas III, IV, V and VI) which aremetal chelates of 1-imino-3-(4-imino-5-thiazolidiylidene)isoindolinesand 1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines, arewater-insoluble pigments, red in shade, and have improved lghtstability. They are useful for coloring natural fibers, syntheticfiber-forming material and cellulosic materials such as threads, sheets,fibers, filaments, textile fabrics and the like, as well as in themanufacture of paper, varnishes, inks, coatings and plastics. Because oftheir excellent light-fastness, the pigments of this invention areparticularly suitable for the preparation of coatings that are designedfor outdoor exposure such as automotive finishes.

The invention sought to be patented, in a second composition of matteraspect, resides in the novel1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines represented by theformula ##STR18## wherein A is a divalent radical combining with the--C═C-- portion of the molecule to which it is attached to form asix-membered carbocyclic ring and is selected from the class having theformulas ##STR19## where in each instance C(7) and C(4) are bonded toC(7a) and C(3a) respectively, and in which R, R₁, R₂ and R₃ are the sameor different and are selected from the class consisting of hydrogen,alkyl having one to three carbon atoms, alkoxy having one to threecarbon atoms, halo, trifluoromethyl, phenyl and phenyl substituted byalkyl having one to three carbon atoms, alkoxy having one to threecarbon atoms and halogen; and Y is a divalent radical combining with the--S--C--C-- portion of the molecule to form a five-membered heterocyclicring having the same orientation as a thiazole ring and selected fromthe group consisting of ##STR20## in which Z is NH, O or S, and N═B islower-alkylamino, di-lower-alkylamino, piperidino, pyrrolidino,morpholino, phenylamino, (lower-alkyl)-(phenyl)amino,phenyl-lower-alkylamino or (lower-alkyl)-(phenyl-lower-alkyl)amino.

Particularly preferred embodiments in accordance with its secondcomposition of matter aspect are as follows:

1. The novel 1-imino-3-(4-imino-5-thiazolidinylidene)-isoindolines ofFormula II wherein A is ##STR21## and Y is ##STR22## of the formula##STR23## in which R, R₁, R₂, R₃ and Z each have the same respectivemeanings indicated in relation to Formula II.

2. The novel 1-imino-3-(4-imino-2-thiazolin-5-ylidene)-isoindolines ofFormula II wherein A is ##STR24## and Y is ##STR25## of the formula##STR26## in which R, R₁, R₂, R₃ and N=B each have the same respectivemeanings given in Formula II.

3. The novel 1-imino-3-(4-imino-5-thiazolidinylidene)-isoindolines ofFormula II wherein A is ##STR27## and Y is ##STR28## of the formula##STR29## in which R, R₁, R₂, R₃ and Z each have the same respectivemeanings given in Formula II.

4. The novel 1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines ofFormula II wherein A is ##STR30## and Y is ##STR31## of the formula##STR32## in which R, R₁, R₂, R₃ and N=B each have the same respectivemeanings given in Formula II.

It will, of course, be understood by those skilled in the art that thecompounds of this invention, both final products and intermediates, mayexist and may be represented in any one of several tautomeric forms.However, structural determinations lead to the conclusion that the formsdepicted by the structural formulas and as named are the most likelyunder ordinary conditions.

In the first of its process aspects, the invention sought to be patentedresides in the process which comprises interacting approximately twomolecular equivalents of a compound of the formula ##STR33## orpreferably the zinc halide adduct thereof with approximately onemolecular equivalent of a metal salt, MeAn₂, wherein A, Me, Y and Aneach have the same respective meanings given in relation to Formula Iand Formula II above.

In a second process aspect, the invention sought to be patented residesin the process for preparing the novel1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines of Formula IIwhich comprises interacting in approximately equimolecular proportions acompound of the formula ##STR34## and a compound of the formula##STR35## wherein A and Y each have the same respective meanings givenin relation to Formula VI above.

As used throughout, the term "halogen" includes bromine, chlorine,fluorine and iodine,

As used herein the term "alkyl having one to three carbon atoms"includes saturated straight- or branched-chain aliphatic radicalsrepresented by, for example, methyl, ethyl, propyl and isopropyl.

Similarly, the term "alkoxy having one to three carbon atoms" includesstraight- or branched-chain alipatic groups attached to the oxygen atom.Included in this term are, for example, methoxy, ethoxy, propoxy andisopropoxy.

In the above general formula, the radical N═B includes:lower-alkylamino; di-lower-alkylamino; saturated N-heterocyclic groups,such as piperidino, pyrrolidino, morpholino, and lower alkylatedderivatives thereof (for example, 2-methylpiperidino,3-ethylpyrrolidino, 3-methylmorpholino and the like); phenyl-amino;(lower-alkyl)-(phenyl)amino; phenyl-lower-alkylamino or(lower-alkyl)-(phenyl-lower-alkyl)amino. The term lower-alkyl includesalkyl radicals containing from one to six carbon atoms which can bestraight or branched. Included in the lower-alkylamino groups are, forexample, methylamino, ethylamino, propylamino, isopropylamino,butylamino, tert.-butylamino, pentylamino and n-hexylamino. In thedi-lower-alkylamino radicals the lower-alkyl groups can be the same ordifferent and thus N=B, when it represents a di-loweralkylamino radical,includes such groups as dimethylamino, diethylamino, ethylmethylamino,dipropylamino, dibutylamino, dipentylamino and dihexylamino.

When N═B represents a phenyl-lower-alkylamino group there are includedsuch groups as benzylamino, phenylethylamino, phenylpentylamino; and thelike. When N═B represents a (lower-alkyl)-(phenyl)amino group there areincluded such groups as (methyl)-(phenyl)amino, N(CH₃)(C₆ H₅);(ethyl)-(phenyl)amino, N(C₂ H₅)(C₆ H₅); (isopropyl)-(phenyl)amino,N(i-C₃ H₇)(C₆ H₅); (butyl)-(phenyl)amino, N(C₄ H₉)(C₆ H₅);(hexyl)-(phenyl)amino, N(C₆ H₁₃)(C₆ H₅); and the like. In the preferredtypes of (lower-alkyl)-(phenyl)amino groups, the lower-alkyl groups havefrom one to six carbon atoms. When representing(lower-alkyl)-(phenyl-lower-alkyl)amino, N═B includes(methyl)-(benzyl)amino, N(CH₃) (C₆ H₅ CH₂); (ethyl)-(phenylethyl)amino,N(C₂ H₅)(C₆ H₅ CH₂ CH₂); (propyl)-(benzyl)amino, N(C₃ H₇)(C₆ H₅ CH₂);(butyl)-(phenylethyl)amino, N(C₄ H₉) (C₆ H₅ CH₂ CH₂); and the like. Inthe preferred types of (lower-alkyl)-(phenyl-lower-alkyl)amino groups,the lower-alkyl groups have from one to six carbon atoms and thealkylene radicals of the phenyl-lower-alkyl groups have from one to fourcarbon atoms.

The term anion, as used herein, means a monovalent inorgaic or organicanion. The choice of an anion is not critical in the operation of thepreparative processes nor is the identity of the anion a criticalfeature of the claimed products. Accordingly, by way of illustration andwithout limitation thereto, the anion can be, for example, bromide,chloride, iodide, hydroxide, nitrate, acetate, p-toluenesulfonate andthe like. Particularly preferred anions are bromide and chloride becauseof the lower cost and greater availability of the nickel, copper orcobalt salts bearing those anions.

The metal chelate pigments of this invention are useful for coloring orprinting paper and cardboard as well as for coloring paper pulps. Theyare also useful for coloring and printing textile materials made fromnatural fibers, such as wool, cotton or linen, those made fromsemi-synthetic fibers, such as regenerated cellulose as represented byrayon or viscose or those made from synthetic fibers, such aspolyaddition, polycondensation or polymerization compounds. Suchcolorings or printings can be carried out with the subject pigments inaccordance with the usual pigment coloring and printing processes.

The metal chelate pigments of this invention are also useful forincorporation into lacquers and films of various constitution, forexample, those made from cellulose acetate, cellulose propionate,polyvinyl chloride, polyethylene, polypropylene, polyamides, polyestersor alkyd resins. In addition the subject compounds are suitable forcoloring natural or synthetic resins, for example acrylic resins, epoxyresins, polyester resins, vinyl resins, polystyrene resins or alkydresins. When dispersed in a clear coating composition vehicle with theincorporation of a small amount of flake aluminum and the compositionscoated and cured on steel test panels, the subject pigments showexcellent transparency, cleanliness and good intensity.

The metal chelate pigments of this invention are characterized byexcellent light-fastness both under accelerated exposure evaluations andunder prolonged outdoor exposure. Thus, when the subject pigmentssuspended in cured acrylic resin dispersion coated on foil-covered paperare exposed to carbon arc radiation, there is no less in color value ofthe pigments after 300 hours of continuous exposure. Moreover, whensteel plates coated with a cured acrylic resin dispersion of the subjectpigments were exposed for twelve months in Florida, there wassubstantially no loss in color value or any indication of darkening.

The best mode contemplated by the inventors of carrying out thisinvention will now be described as to enable any person skilled in theart to which it pertains to make and use the same.

Generally speaking, the novel metal chelate pigments of Formula I areconveniently obtained by interacting approximately two molecularequivalents of the appropriate1-imino-3-(4-imino-5-thiazolidinylidene)isoindoline or1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindoline of Formula II withone molecular equivalent of a metal salt, MeAn₂, wherein Me and An havethe same meanings given hereinabove. The reaction is preferably carriedout at a temperature between about 0° C and 100° C in either an aproticor protic solvent. Aprotic solvents suitable for the reaction are, forexample, dimethylformamide, dimethylsulfoxide andhexamethylphosphoramide. Among protic solvents useful for this reactionare, for example, water; lower-aliphatic alcohols, for instance,methanol, ethyl alcohol, isopropyl alcohol, etc.; and ether glycols, forinstance, 2-methoxyethanol, 2-ethoxyethanol, etc.

An alternate and preferred procedure for preparing the metal chelates ofFormula I is carried out by interacting approximately two molecularequivalents of a zinc halide adduct of the appropriate1-imino-3-(4-imino-5-thiazolidinylidene)isoindoline or1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindoline of Formula II withone molecular equivalent of a metal salt, MeAn₂, wherein Me and An havethe same meanings given hereinabove. The reaction using the zinc halideadduct is preferably carried out at a temperature between about 0° C and100° C in an aprotic solvent, for example, dimethylformamide,dimethylsulfoxide, hexamethylphosphoramide, etc. The requisite zinchalide adduct is readily obtained by treatment of the appropriate1-imino-3-(4-imino-5-thiazolidinylidene)isoindoline or1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindoline with a solution ofthe zinc halide in an aprotic solvent, for example, dimethylformamide.Although the adduct, which is initially obtained as a solid suspended inthe aprotic solvent may be subjected without isolation to interactionwith the chelating metal salt, we generally prefer to separate theproduct by filtration prior to its use for forming the metal chelatepigment. Particularly preferred zinc halides for preparation of theadduct are zinc chloride and zinc bromide and particularly preferredtemperature for the preparation of the metal chelates, either directlyor by way of the zinc halide adduct, is at a temperature between about15° and 50° C.

We have also found that the novel metal chelate pigments of Formula Iare obtained by first interacting approximately two molecularequivalents of the appropriate 1,3-diiminoisoindoline with one molecularequivalent of a metal salt, MeAn₂, followed by the addition ofapproximately two molecular equivalents of the appropriateiminothiazolidine or iminothiazoline. The same general conditions ofreaction, that is, temperature and solvent system described for thepreparative methods described above are also applicable to thissynthetic approach.

The metal chelate pigments of this invention which bear either of thepreferred anions, bromide or chloride, are, of course, obtained bydirect chelation of the appropriate compound of Formulas VII, VIII, IXor X with the appropriate metal (II) bromide or chloride. However, wehave found that corresponding metal chelate pigments bearing hydroxideas the anion are obtained by employing a metal (II) salt in which theanion is organic in nature. For example, when the appropriate1-imino-3-(4-imino-5-thiazolidinylidene)isoindoline or1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindoline is subjected tointeraction with the appropriate hydrated metal (II) p-toluenesulfonatein the presence of dimethylformamide, the anion obtained is hydroxide.The same result is also obtained by anion exchange. Thus, when thecorresponding metal chelate pigment bearing a halide as the anion isheated for several hours in the presence of aqueous methanesulfonicacid, the halide is replaced by hydroxide. On the other hand, forreasons that are not completely understood, we have found that heatingthe same metal chelate pigment bearing halide as the anion with aqueousp-toluenesulfonic acid for several hours, yields the corresponding metalchelate pigment bearing a p-toluenesulfonate anion.

The novel 1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines represented byFormula II, which are used to prepare the metal chelate pigments ofFormula I are readily prepared by the condensation of the appropriae1,3-diiminoisoindoline through one of the imino moieties with the lossof ammonia at the site of the active methylene moiety of the appropriate4-iminothiazolidine or 4-imino-2-thiazoline. The iminothiazolidines andiminothiazolines used in the preparation are generally unstable in thefree-base form and are preferably employed in the form of their acidaddition salts, for example, the hydrochloride, benzensulfonate, etc.The reaction proceeds smoothly at reflux in a lower-aliphatic alcoholsuch as methanol and is preferably carried out under an atmosphere ofnitrogen. When the acid addition salt is used in the reaction, theresultant 1-imino-3-(4-imino-5-thiazolidinylidene)isoindoline or1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindoline separates in theform of an acid addition salt which is converted to its freebase form bytreatment with a slight excess of a base, such as triethylamine.Alternatively, the acid addition salt form of the iminothiazolidine oriminothiazoline can be converted initially to the free-base form in situby the addition of a stoichiometric quantity of a base to the reactionmixture prior to the addition of the 1,3-diiminoisoindoline.

The 1,3-diiminoisoindolines of Formula XI required for the preparationof the novel 1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines andthe 1-imino-3-(4-imino-2-thiazolin-5-ylidene)-isoindolines of Formula IIare a known class of compounds readily obtained by procedures well-knownin the prior art [cf. e.g. (1) Angew. Chem. 68, 133 (1956); (2) J. Chem.Soc. 3525 (1955); (3) Brit. Pat. Specification 698,049]. For example, anappropriate phthalonitrile is interacted with ammonia or with asubstance which gives off ammonia under the reaction conditions, forinstance, urea to obtain the corresponding 1,3-diiminoisoindoline. Forexample, the following 1,3-diiminoisoindolines of Formula II are usefulstarting materials for preparing both the1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and the1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines represented byFormula VI above. Those intermediates in the following list whosephysical properties and/or preparation are described in theabove-mentioned references, (1), (2) or (3), are so indicated.

1,3-Diiminoisoindoline, mp 180°-182 C (dec) (1)

4,5,6,7-Tetrahydro-1,3-diiminoisoindoline, mp 177°-180° C (dec) (2)

5-Methyl-1,3-diiminoisoindoline, mp 189°-190° C (dec) (3)

4,5-Dimethyl-1,3-diiminoisoindoline

5,6-Dimethyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

4,5,6,7-Tetraethyl-1,3-diiminoisoindoline

4,5,7-Trimethyl-1,3-diiminoisoindoline

4-Isopropyl-7-methyl-1,3-diiminoisoindoline

4,7-Dimethoxy-1,3-diiminoisoindoline

5,6-Dimethoxy-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

4,5-Dipropyl-7-ethoxy-1,3-diiminoisoindoline

5-Ethoxy-1,3-diiminoisoindoline, mp 217°-218° C (3)

4,5,7-trimethoxy-1,3-diiminoisoindoline

4,7-Diethoxy-1,3-diiminoisoindoline

4-Chloro-1,3-diiminoisoindoline (3)

5-Bromo-1,3-diiminoiosindoline

5-Chloro-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

5,6-Dichloro-1,3-diiminoisoindoline, mp 265° C (dec) (1)

4,5,6,7-Tetrachloro-1,3-diiminoisoindoline, mp 295°-300° C (dec) (1)

5,6-Dibromo-4,7-difluoro-1,3-diiminoisoindoline

5-Chloro-4,6,7-trifluoro-1,3-diiminoisoindoline

4-Bromo-6-methyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

5,6-Diiodo-4,7-dimethoxy-1,3-diiminoisoindoline

4,7-Difluoro-1,3-diiminoisoindoline

4,5,6,7-Tetrabromo-1,3-diiminoisoindoline

5-Phenyl-1,3-diiminoisoindoline (3)

4-Methyl-5,6,7-triphenyl-1,3-diiminoisoindoline

5-Methyl-4-phenyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

4-(3,4-Dimethoxyphenyl)-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

7-Ethoxy-4-methyl-5-phenyl-1,3-diiminoisoindoline

4-(p-Chlorophenyl)-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

4-(p-Bromophenyl)-7-phenyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

4,5,7-Triphenyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline

4,5,6,7-Tetraphenyl-1,3-diiminoisoindoline

5-(2,4,5-Trimethylphenyl)-1,3-diiminoisoindoline

5,6-Diphenyl-1,3-diiminoisoindoline (3)

5-Phenoxy-1,3-diiminoisoindoline, mp 99° C (3)

5-methoxy-1,3-diiminoisoindoline, mp 202° C (dec) (3)

5-(2',5'-Dimethoxyphenyl)-1,3-diiminoisoindoline

5-Chloro-1,3-diiminoisoindoline

6,7-Dichloro-1,3-diiminoisoindoline

7-Chloro-1,3-diiminoisoindoline

An alternate but similar route to the preparation of the novel1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines represented byFormula II comprises the condensation of the appropriate1-imino-3-lower-alkoxyisoindoline or 1-imino-3-mercaptoisoindolinethrough the alkoxy or mercapto moiety respectively at the site of theactive methylene moiety of the appropriate 4-iminothiazolidine or4-imino-2-thiazoline. Although either the appropriate1-imino-3-lower-alkoxyisoindoline or 1-imino-3-mercaptoisoindoline maybe substituted in the preparative route described above which utilizesthe approprate 1,3-diiminoisoindoline, a particularly convenientprocedure involves in a single operation the in situ formation of the1-imino-3-lower-alkoxyisoindoline or 1-imino-3-mercaptoiosindoline andthe condensation thereof with the appropriate iminothiazolidine oriminothiazoline. Thus, in nitrogen one molecular equivalent of theappropriate iminothiazolidine or iminothiazoline in the form of the acidaddition salt is added to the stirred reaction mixture at 0° C andstirring is continued for approximately sixteen to eighteen hours whilstpermitting the reaction to warm gradually to room temperature.

The thiazolidines represented by Formula XII when Y is ##STR36## and the2-thiazolidines when Y is ##STR37## which are required for condensationwith the 1,3-diiminoisoindolines to obtain the novel1-imino-3-(4-imino-5-thiazolidinylidene)isoindolines and the1-imino-3-(4-imino-2-thiazolin-5-ylidene)isoindolines, respectively, ofFormula II are generally known in the art and are conveniently preparedby employing known chemical procedures. For example, the known2,4-diiminothiazolidine (Formula XII where Y is ##STR38## is obtained bythe interaction of a haloacetonitrile with thiourea.

The starting material, 2,4-diiminothiazolidine, also serves as thestarting material for the preparation of the known compound,4-imino-2-thiazolidinone (Formula XII where Y is ##STR39## Thus,2,4-diiminothiazolidine is in a first step hydrolyzed to obtain2,4-dioxothiazolidine which is then in the second step interacted withphosphorus pentasulfide to obtain 2-oxo-4-thioxothiazolidine. Finally,in a third step, this intermediate is treated with ammonium hydroxide toconvert the 4-thioxo moiety to an imino group thus yielding the desired4-imino-2-thiazolidinone.

The starting material 4-imino-2-thiazolidinethione (Formula XII where Yis ##STR40## is similarly prepared by first interacting commerciallyavailable 4-oxo-2-thioxothiazolidine with phosphorus pentasulfide toproduce 2,4-dithioxothiazolidine which upon treatment with ammoniumhydroxide yields the desired 4-imino-2-thiazolidinethione.

The 2-amino-substituted-4-imino-2-thiazoline starting materials depictedby Formula XII wherein Y represents ##STR41## are conveniently preparedby the interaction of a haloacetonitrile and the appropriatelysubstituted thiourea of the formula ##STR42## wherein N═B has the samerespective meanings given for Formulas I, II, IV, VI and VIII above. Forexample, the following compounds of Formula XII (named as the free base)are useful starting materials for condensation with the1,3-diiminoisoindoline starting materials described above for obtainingthe novel1-imino-3-(2-amino-substituted-4-imino-2-thiazolin-5-ylidene)isoindolinesof formula II in which Y is N═B.

2-methylamino-4-imino-2-thiazoline

2-Isopropylamino-4-imino-2-thiazoline

2-(2-Methylbutylamino)-4-imino-2-thiazoline

2-n-Hexylamino-4-imino-2-thiazoline

2-Anilino-4-imino-2-thiazoline

2-Diethylamino-4-imino-2-thiazoline

2-N-Methylethylamino-4-imino-2-thiazoline

2-Di-t-butylamino-4-imino-2-thiazoline

2-Di-n-hexylamino-4-imino-2-thiazoline

2-Benzylamino-4-imino-2-thiazoline

2-(3-Phenylpropylamino)-4-imino-2-thiazoline

2-(5-Phenylpentylamino)-4-imino-2-thiazoline

2-N-Ethylanilino-4-imino-2-thiazoline

2N-Butylanilino-4-imino-2-thiazoline

2-(p-Ethylanilino)-4-imino-2-thiazoline

2-Dibenzylamino-4-imino-2-thiazoline

2-N-Ethylbenzylamino-4-imino-2-thiazoline

2-(p-Chloroanilino)-4-imino-2-thiazoline

2-(o-Methoxyanilino)-4-imino-2-thiazole

2-N-Methyl(p-bromobenzylamino)-4-imino-2-thiazole

2-Pyrrolidino-4-imino-2-thiazoline

2-Piperidino-4-imino-2-thiazoline

2-Morpholino-4-imino-2-thiazoline

2-(2-Methylpiperidino)-4-imino-2-thiazoline

2-(3-Ethylpyrrolidino)-4-imino-2-thiazoline

2-(3-Methylmorpholino)-4-imino-2-thiazoline

The structures of the compounds of this invention were established bythe moes of synthesis, by elementary analyses of representative samples,and by ultraviolet, infrared and nuclear magnetic resonance spectralanalyses. The course of the reactions for the preparation of theintermediates and their consumption in the chelating reactions wasfollowed by the use of thin layer chromatography.

The invention is illustrated by the following examples without, however,being limited thereto. Melting points are uncorrected unless otherwiseindicated.

EXAMPLE 1

A. To a stirred solution of 61 parts of 28 percent aqueous ammoniumhydroxide solution and 2500 parts of water under an atmosphere ofnitrogen there was simultaneously added at ambient temperature during aperiod of ninety minutes 273 parts of 2,4-diiminothiazolidiniumbenzenesulfonate and 853 parts of a 17.1 percent by weight methylalcohol solution of 1,3-diiminoisoindoline. A yellow solid separatedduring the addition. Stirring was continued at room temperature forapproximately sixteen hours after the additions were complete and thethick yellow reaction slurry was then filtered. The product collected onthe funnel was washed copiously with distilled water and finally driedat 50° C in vacuo to obtain 233 parts of1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline as a yellowsolid melting at 252°-263° C (dec).

Anal. Calcd. for C₁₁ H₉ N₅ S: C 54.30; H 3.73; N 28.79; S 13.18. Found:C 54.15; H 3.85; N 28.63; S 12.92.

This compound, which corresponds to Formula VII wherein R, R₁, R₂ and R₃are each hydrogen, and Z is NH, was found on testing in vitro bystandard serial dilution procedures to a bacteriostatic versusSalmonella typhosa Hopkins at a concentration of 250 parts per millionand bactericidal at 750 parts per million; and both bacteriostatic andbactericidal versus Clostridium welchii M at 100 parts per million.

B. To a stirred solution of 150 parts of zinc chloride in 2280 parts ofdimethylformamide there was added at ambient temperature 243 parts of1-imino-3-(2,4-diimino- 5-thiazolidinylidene)-isoindoline which wentinto solution. After approximately five to 10 minutes of continuedstirring, the zinc chloride adduct began to separate from the reactionmixture as a yellow precipitate. Stirring at room temperature wascontinued overnight after which the product was collected by filtration,washed first with fresh dimethylformamide, then with acetone and finallydried in a vacuum oven at 50° C to obtain 390 parts of the zinc chlorideadduct of 1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline as ayellow powder which melted at 337°-338° C (dec).

Anal. Calcd. for C₁₁ H₉ N₅ S . ZnCl₂ : C 35.28; H 2.44; N 18.50; S 8.46;Cl 17.94; Zn 16.68. Found: C 34.81; H 2.39; N 18.45; S 8.45; Cl 18.68;Zn 17.22.

When the above-described procedure was employed but zinc bromide wasused in place of zinc chloride, the zinc bromide adduct of1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline was obtained asa yellow powder which melted at 347°-348° C (dec).

C. To a stirred solutionof 130.5 parts of nickel (II) chloridehexahydrate in 2260 parts of dimethylformamide, there was added at roomtemperature 380 parts of the zinc chloride adduct of1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline from B. Thereaction slurry was then stirred at ambient temperature for a period offour hours during which the mixture gradually changed from yellow todeep red. During the next two hours, the slurry was gradually heated to100° C and was maintained at that temperature for four hours. Ammoniawas evolved during the reaction period. The suspended red solid was thencollected by filtration, washed successively with freshdimethylformamide, water and finally acetone. The solid was then driedin vacuo at 50° C to obtain 285 parts of the blue-red nickel chelatepigment represented by Formula III wherein Me is Ni; Z is NH; R, R₁, R₂and R₃ are each hydrogen and An is Cl.

Anal. Calcd. for C₂₂ H₁₄ ClN₉ NiS₂ : C 46.96; H 2.50; Cl 6.31; N 22.41;Ni 10.43; S 11.40. Found: C 43.97; H 2.81; Cl 5.66; N 20.21; Ni 9.76; S10.65; H₂ O 7.45. (On dry basis) C 47.51; H 2.23; Cl 6.11; N 21.84; Ni10.55; S 11.51.

EXAMPLE 2

A mixture of 4.35 parts of 1,3-diiminoisoindoline and 50 parts ofdimethylformamide was stirred and heated to 50° C to effect completesolution. The solution was cooled to a temperature in the range 15° to20° C and there was then added a solution of 3.92 parts of nickel (II)chloride hexahydrate in 30 parts of dimethylformamide. Stirring wascontinued for thirty minutes after the addition during which period ayellow solid gradually deposited from the solution. To the stirredsuspension there was then added 8.2 parts of 2,4-diiminothiazolidiniumbenzenesulfonate. Stirring was continued at room temperature forapproximately sixteen hours. A red solid gradually separated from thereaction mixture during the stirring period. The mixture was then heatedat 100° C for five hours after which the product was collected byfiltration, washed successively with dimethylformamide, water andacetone. The product was dried in vacuo to obtain 7.3 parts of thenickel chelate pigment which corresponds to Formula III wherein Me isNi; Z is NH; R, R₁, R.sub. 2 and R₃ are each hydrogen; and An is Cl. Theproduct has the same blue-red shade as the product obtained in Example1, part C, above.

EXAMPLE 3

A. A mixture of 25.5 parts of1,3-diimino-4,5,6,7-tetrachloroisoindoline, 13.65 parts of2,4-diiminothiazolidine hydrochloride and 600 parts of dimethylformamidewas stirred and heated under an atmosphere of nitrogen at a temperaturein the range 65°-70° C for approximately 16 hours. The reaction mixturewas then cooled to 10° C and filtered. The collected solid was washedwith 60 parts of fresh dimethylformamide, slurried with 1200 parts of aten percent aqueous solution of sodium carbonate and then refiltered.The collected solid was recrystallized from hot glacial acetic acid toobtain1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate as a brown powder melting with gradual decomposition above 200°C.

Anal. Calcd. for C₁₁ Cl₄ H₅ N₅ S . C₂ H₄ O₂. C 35.39; H 2.06; Cl 32.15;N 15.88; S 7.27. Found: C 35.47; H 2.15; Cl 32.87; N 16.11; S 7.43.

This compound, which corresponds to Formula VII wherein R, R₁, R₂ and R₃are each Cl, and Z is NH, was found on testing in vitro by standardserial dilution procedures to be bacteriostatic versus: Staphylococcusaureus 209 at a minimal concentration of 31.3 parts per million;Pseudomonas aeruginosa 211 at 62.5 parts per million; Esherichia coli at62.5 parts per million; and Proteus vulgaris ATCC 9920 at 125 parts permillion.

B. To a stirred solution of 2.5 parts of nickel (II) chloridehexahydrate in 500 parts of hexamethylphosphoramide, there was added atroom temperature during a period of 30 minutes, 7.6 parts of1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineobtained by treating the acetate-salt form of A with methanolictriethylamine. After the addition was complete, the reaction mixture wasstirred at room temperature for 16 hours and then filtered. Thecollected solid was washed with fresh hexamethylphosphoramide, then withwater and finally dried in vacuo at 100° C to obtain the dark-redpigment corresponding to Formula III in which Me is Ni; Z is NH; R, R₁R₂ and R₃ are each Cl; and An is Cl.

Anal. Calcd. for C₂₂ H₆ Cl₉ N₉ NiS₂ : C 31.52; H 0.72; Cl 38.06; N15.04; Ni 7.01; S 7.65. Found: C 31.36; H 0.73; Cl 37.88; N 14.97; Ni7.29; S 7.74.

EXAMPLE 4

A. A mixture of 3.5 parts of 4-imino-2-thiazolidinone, 4.4 parts of1,3-diiminoisoindoline and 100 parts of methanol was stirred under anatmosphere of nitrogen at room temperature for three hours and then atreflux temperature for two hours. The reaction mixture was cooled to 25°C and the solid therein was collected by filtration, washed with freshmethanol and dried in vacuo at 50° C to obtain 5.4 parts of1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline as a yellowpowder melting at 346°-348° C (dec).

Anal. Calcd. for C₁₁ H₈ N₄ OS (M.W. 244.25): N 22.94; S 13.13. Found: N23.00; S 13.28.

Mass spectrum determination showed a parent peak at M⁺ 244. Thiscompound corresponds to Formula VII wherein R, R₁, R₂ and R₃ are eachhydrogen and Z is O.

B. To a stirred solution of 2.7 parts of nickel toluenesulfonatehexahydrate in 100 parts of dimethylformamide there was added at roomtemperature 2.44 parts of1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline. Thetemperature of the reaction mixture was gradually raised to reflux overa period of three hours and maintained for an additional hour. Thereaction mixture which gradually changed color from yellow to dark redduring the heating period, was cooled to 25° C and the solid thereincollected by filtration. After successive washings withdimethylformamide, water and finally acetone, the solid was dried invacuo to obtain 2.2 parts of the red pigment represented by Formula IIIin which Me is Ni, Z is O; R, R₁, R₂ and R₃ are each hydrogen; and An isOH.

Anal. Calcd. for C₂₂ H₁₂ N₇ NiO₃ S₂ : C 48.46; H 2.22; N 17.98; Ni10.77; S 11.77. Found: C 48.96; H 2.16; N 18.01; Ni 10.90; S 11.64.

EXAMPLE 5

Three parts of the nickel (II) chloride chelate pigment obtained inExample 1C above was dissolved in 39 parts of methanesulfonic acid atapproximately 75° C under an atmosphere of nitrogen. To the stirredsolution was added 19.2 parts of water after which heating was effectedto and held at 125° C for 5 hours. A red solid gradually separatedduring the heating period. The reaction mixture was cooled to 25° C andfiltered. The collected solid was washed successively with aqueousmethanesulfonic acid, water and acetone and finally dried in vacuo toobtain the nickel chelate pigment represented by Formula III wherein Meis Ni; Z is O; R, R₁, R₂ and R₃ are each hydrogen; and An is OH. Thisproduct was of the same shade and hue as that obtained in Example 4,part B, above and had an infrared spectrum identical to that obtainedfor the product of Example 4, part B above.

Anal. Calcd. for C₂₂ H₁₂ N₇ NiO₃ S₂ : C 48.46; H 2.22; N 17.98; Ni10.77; S 11.77. Found: C 48.30; H 2.33; N 17.74; Ni 10.55; S 11.14.

EXAMPLE 6

To a stirred solution of 178 parts of p-toluenesulfonic acid in 22 partsof water warmed to approximately 85° C, there was added ten parts of thenickel (II) chloride chelate pigment obtained in Example 1C above. Thereaction mixture was heated at reflux for a period of approximately 19hours during which a red solid gradually separated. The solid wascollected by filtration and washed successively with a 70 percentaqueous solution of p-toluenesulfonic acid, water, and finally acetone.The product was dried in vacuo to obtain 8.8 parts of the blue-redpigment corresponding to Formula II wherein Me is Ni; R, R₁, R₂ and R₃are each hydrogen; Z is O; and An is p-(CH₃)C₆ H₄ SO₃.

Anal. Calcd. C₂₉ H₁₉ NiO₅ S₃ : C 49.73; H 2.73; N 14.00; Ni 8.38; S13.73. Found: C 49.59; H 2.82; N 14.19; Ni 8.15; S 13.60.

EXAMPLE 7

To a stirred suspension of 9.7 parts of1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline in 100 parts ofhexamethylphosphoramide there was added 3.45 parts of copper (II)chloride dihydrate. The reaction mixture was stirred at room temperaturefor approximately 16 hours and was then heated to and held at 100° C forfour hours. The mixture was filtered and the collected solid was washedwith fresh hexamethylphosphoramide and finally with water. The productwas dried in vacuo to obtain the dark red copper chelate pigmentrepresented by Formula II wherein Me is Cu; Z is NH; R, R₁, R₂ and R₃are each hydrogen; and An is Cl.

EXAMPLE 8

Following the procedure described above in Example 7, but substituting4.8 parts of cobalt (II) chloride hexahydrate for the copper (II)chloride dihydrate used in that example, there was obtained the browncobalt chelate pigment corresponding to Formula II wherein Me is Co; Zis NH; R, R₁, R₂ and R₃ are each hydrogen; and An is Cl.

EXAMPLE 9

A. A mixture of 33.1 parts of 1-piperidyl thiocarbamide, 140 parts ofethyl alcohol and 17.4 parts of chloroacetonitrile was heated at refluxfor one and one-half hours. The reaction mixture was then chilled in anice bath to less than 10° C and filtered. The white crystalline solidisolated by the filtration was dried to obtain 26 parts of2-piperidino-4-imino-2-thiazoline hydrochloride which gradually softenedabove 200° C and decomposed at 321° C. An additional 21 parts of theproduct were obtained by concentrating the filtrate.

Anal. Calcd. for C₈ H₁₃ N₃ S · HCl: C 43.73; H 6.42; Cl 16.13; N 19.12;S 14.59. Found: C 43.77; H 6.36; Cl 16.14; N 19.25; S 14.56.

B. To a solution of 21.9 parts of 2-piperidino-4-imino-2-thiazolinehydrochloride in 240 parts of methyl alcohol there was added 14.5 partsof 1,3-diiminoisoindoline. The resultant mixture was heated at refluxfor six hours, then chilled to 0° C and filtered. The collected solidwas washed with methyl alcohol and dried at 50° C to obtain 27 parts of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride melting at 320°-321° C (dec). The assigned chemicalstructure was completely corroborated by a concordant nuclear magneticresonance spectrum. The hydrochloride salt is readily converted to thefree base, a colorless solid melting at 226°-227° C, by treatment withdilute ammonium hydroxide. This compound, which corresponds to FormulaVIII wherein R, R₁, R₂ and R₃ are each hydrogen and N═B is piperidino,was found on testing in vitro by standard serial dilution procedures tobe bacteriostatic versus: Staphylococcus aureus 209 at a minimalconcentration of 6.3 parts per million; Esherichia coli at 62.5 partsper million; Pseudomonas aeruginosa 211 at 125 parts per million; andfungicidal versus Tricophyton mentogrophytes at 62.5 parts per million;Aspergillus niger at >125 parts per million; and Candida albicans at 125parts per million.

C. To a solution of 0.5 part of nickel (II) chloride hexahydrate in 40parts of methyl alcohol there was added at 25° C 1.2 parts of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline. Adeep red solution resulted which was stirred at 25° C for two hours andwas then heated at reflux for two hours. To the solution there was added80 parts of dioxane. The solid, which separated from the solution, wascollected by filtration, washed with 75 percent aqueous dioxane solutionand finally dried in vacuo at 100° C to obtain 1.1 parts of dark redpigment which remained unmelted at 345° C. This product, whichcorresponds to Formula III wherein Me is Ni; R, R₁, R₂ and R₃ are eachhydrogen; N═B is piperidino; and An is Cl, was found to be solvated byone mole of water and one mole of methyl alcohol.

Anal. Calc'd for C₃₂ H₃₀ ClN₉ NiS₂ · CH₃ OH · H₂ O. C 52.91; H 4.84; Cl4.74; N 16.83; Ni 7.84; S 8.56. Found: C 52.36; H 4.20; Cl 4.42; N16.07; Ni 7.73; S 8.35. Nuclear magnetic resonance spectrum wasconcordant for the solvated assigned structure.

EXAMPLE 10

A. A mixture of 6 parts of 2,4-diiminothiazolidine hydrochloride, 6parts of 4,5,6,7-tetrahydro-1,3-diiminoisoindoline and 100 parts ofanhydrous methyl alcohol was stirred and heated at reflux under anatmosphere of nitrogen for approximately 16 hours. The reaction was thencooled and filtered. The solid product collected by filtration wasconverted to the free base by treatment with a slight excess of a methylalcohol solution of triethylamine and the product thus obtained wasrecrystallized from acetic acid. The resultant acetate salt was treatedwith dilute ammonium hydroxide and the product isolated to obtain in thefree-base form1-imino-4,5,6,7-tetrahydro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineas a greenish-brown powder melting at 215°-223° C (dec).

Anal. Calc'd for C₁₁ H₁₃ N₅ S: C 53.42; H 5.30; N 28.32; S 12.96. Found:C 53.37; H 5.29; N 28.20; S 13.10.

This compound, which corresponds to Formula IX wherein R, R₁, R₂ and R₃are each hydrogen and Z is NH, was found on testing in vitro by standardserial dilution procedures to be bacteriostatic versus: Staphylococcusaureus 209 at a minimal concentration of 31.3 parts per million;Pseudomonas aeruginosa 211 at 125 parts per million; Esherichia coli at125 parts per million; and Proteus vulgaris ATCC 9920 at 125 parts permillion.

B. Following a procedure similar to that described in Example 3, part Bhereinabove, 7.3 parts of the1-imino-4,5,6,7-tetrahydro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineobtained in A, was interacted with 3.75 parts of nickel (II) chloridehexahydrate in 350 parts of hexamethylphosphoramide to obtain the darkblue-red pigment corresponding to Formula V wherein Me is Ni; R, R₁, R₂and R₃ are each hydrogen; Z is NH; and An is Cl.

Anal. Calc'd for C₂₂ H₂₂ ClN₉ NiS₂ : C 46.31; H 3.89; Cl 6.21; N 22.08;Ni 10.29; S 11.24. Found: C 46.50; H 3.82; Cl 6.08; N 22.10; Ni 10.48; S11.30.

EXAMPLE 11

A. When an equivalent amount of 4-imino-2-thiazolidinethione issubstituted for the 4-imino-2-thiazolidinone used in the proceduredescribed in Example 4, part A above, there is obtained as the product1-imino-3-(2-thioxo-4-imino-5-thiazolidinylidene)isoindoline.

B. Following the procedure described in Example 4, part B above butusing an equivalent amount of1-imino-3-(2-thioxo-4-imino-5-thiazolidinylidene)isoindoline in place of1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline, there isobtained as the product a metal chelate pigment corresponding to FormulaIII in which Me is Ni; Z is S; R, R₁, R₂ and R₃ are each hydrogen; andAn is OH.

EXAMPLE 12

A. When equivalent amounts of 2-methylamino-4-imino-2-thiazolinehydrochloride and 5,6-dichloro-1,3-diiminoisoindoline are substitutedfor the 2,4-diiminothiazolidine hydrochloride and1,3-diimino-4,5,6,7-tetrachloroisoindoline respectively in the proceduredescribed in Example 3, part A above, there is obtained as the product1-imino-5,6-dichloro-3-(2-methylamino-4-imino-2-thiazolin-5-ylidene)isoindolineacetate.

B. Following the procedure described in Example 3, part B above butusing an equivalent amount of1-imino-5,6-dichloro-3-(2-methylamino-4-imino-2-thiazolin-5-ylidene)isoindolineacetate in place of1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate, there is obtained as the product a metal chelate pigmentcorresponding to Formula IV in which Me is Ni; N═B is HNCH₃ ; R and R₃are each hydrogen; R₁ and R₂ are each Cl; and An is Cl.

EXAMPLE 13

A. When an equivalent amount of4,5-dipropyl-7-ethoxy-1,3-diiminoisoindoline is substituted for the1-3-diiminoisoindoline used in the procedure described in Example 1,part A above, there is obtained as the product1-imino-4,5-dipropyl-7-ethoxy-3-(2,4-diimino-5-thiazolidinylidene)isoindoline.

B. Following the procedure described in Example 7 above but using anequivalent amount of1-imino-4,5-dipropyl-7-ethoxy-3-(2,4-diimino-5-thiazolidinylidene)isoindolinein place of 1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline,there is obtained as the product a metal chelate pigment correspondingto Formula III in which Me is Cu; Z is NH; R is OC₂ H₅, R₂ and R₃ areeach C₃ H₇ ; R₁ is hydrogen; and An is Cl.

EXAMPLE 14

A. When equivalent amounts of 5-methyl-1,3-diiminoisoindoline and4-imino-2-thiazolidinethione are substituted for the1,3-diiminoisoindoline and 4-imino-2-thiazolidinone respectively, in theprocedure described in Example 4, part A above, there is obtained as theproduct1-imino-5-methyl-3-(2-thioxo-4-imino-5-thiazolidinylidene)isoindoline.

B. Following the procedure described in Example 4, part B above butusing an equivalent amount of1-imino-5-methyl-3-(2-thioxo-4-imino-5-thiazolidinylidene)isoindoline inplace of 1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline,there is obtained as the product a metal chelate pigment correspondingto Formula III in which Me is Ni; Z is S; R₂ is CH₃ ; R, R₁ and R₃ areeach hydrogen; and An is OH.

EXAMPLE 15

A. When equivalent amounts of 4,5,6,7-tetraethyl-1,3-diiminoisoindolineand 2-isopropylamino-4-imino-2-thiazoline hydrochloride are substitutedfor the 1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, in the procedure described in Example 9,part B above, there is obtained as the product1-imino-4,5,6,7-tetraethyl-3-(2-isopropylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above butusing an equivalent amount of1-imino-4,5,6,7-tetraethyl-3-(2-isopropylamino-4-imino-2-thiazolin-5-ylidene)isoindolinein the free-base form in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni; R, R₁, R₂ and R₃ are each C₂ H₅ ; N═B isiso-C₃ H₇ NH; and An is Cl.

EXAMPLE 16

A. When equivalent amounts of 4,7-dimethoxy-1,3-diiminoisoindoline and2-(2-methylbutylamino)-4-imino-2-thiazoline hydrochloride aresubstituted for the 1,3-diiminoisoindoline and2-piperidino-4-imino-2-thiazoline hydrochloride respectively, in theprocedure described in Example 9, part B above, there is obtained as theproduct1-imino-4,7-dimethoxy-3-[2-(2-methylbutylamino)-4-imino-2-thiazolin-5-ylidene]isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above butusing an equivalent amount of1-imino-4,7-dimethoxy-1-[2-(2-methylbutylamino)-4-imino-2-thiazolin-5-ylidene]isoindolinein the free-base form in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni; R and R₃ are each OCH₃ ; R₁ and R₂ areeach hydrogen; N═B is NHCH₂ CH(CH₃)CH₂ CH₃ ; and An is Cl.

EXAMPLE 17

A. When equivalent amounts of 4-chloro-1,3-diiminoisoindoline and2-n-hexylamino-4-imino-2-thiazoline hydrochloride are substituted forthe 1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, in the procedure described in Example 9,part B above, there is obtained as the product1-imino-4-chloro-3-(2-n-hexylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 8 above but using anequivalent amount of1-imino-4-chloro-3-(2-n-hexylamino-4-imino-2-thiazolin-5-ylidene)isoindolinein the free-base form in place of1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline, there isobtained as the product a metal chelate pigment corresponding to FormulaIV in which Me is Co; R₃ is Cl; R, R₁ and R₂ are each hydrogen; N═B isNH-n-C₆ H₁₃ ; and An is Cl.

EXAMPLE 18

A. When equivalent amounts of 4,5-dimethyl-1,3-diiminoisoindoline and2-anilino-4-imino-2-thiazoline hydrochloride are substituted for the1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, in the procedure described in Example 9,part B above, there is obtained as the product1-imino-4,5-dimethyl-3-(2-anilino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above butusing equivalent amounts of1-imino-4,5-dimethyl-3-(2-anilino-4-imino-2-thiazolin-5-ylidene)isoindolinein the free-base form and nickel (II) bromide trihydrate in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline andnickel (II) chloride hexahydrate respectively, there is obtained as theproduct a metal chelate pigment corresponding to Formula IV in which Meis Ni; R₂ and R₃ are each CH₃ ; R and R₁ are each hydrogen; N═B is NHC₆H₅ ; and An is Br.

EXAMPLE 19

A. When an equivalent amount of 5-bromo-1,3-diiminoisoindoline issubstituted for the 1,3-diiminoisoindoline in the procedure described inExample 4, part A above, there is obtained as the product1-imino-5-bromo-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline.

B. Following the procedure described in Example 4, part B above butusing an equivalent amount of1-imino-5-bromo-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline inplace of 1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline,there is obtained as the product a metal chelate pigment correspondingto Formula III in which Me is Ni; R₂ is Br; R, R₁ and R₃ are eachhydrogen; Z is O; and An is OH.

EXAMPLE 20

A. Following the procedure described in Example 9, part B above butusing equivalent amounts of5,6-diiodo-4,7-dimethoxy-1,3-diiminoisoindoline and2-diethylamino-4-imino-2-thiazoline hydrochloride in place of1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, there is obtained as the product1-amino-5,6-diiodo-4,7-dimethoxy-3-(2-diethylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. When an equivalent amount of1-imino-5,6-diiodo-4,7-dimethoxy-3-(2-diethylamino-4-imino-2-thiazolin-5-ylidene)isoindolinein the form of the free base is substituted for the1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline in theprocedure described in Example 9, part C above, there is obtaind as theproduct a metal chelate pigment corresponding to Formula IV in which Meis Ni, R and R₃ are each OCH₃ ; R₁ and R₂ are each I; N═B is N(C₂ H₅)₂ ;and An is Cl.

EXAMPLE 21

A. When the procedure described in Example 9, part B above is followedbut using equivalent amount of 4,5,6,7-tetrabromo-1,3-diiminoisoindolineand 2-N-methylethylamino-4-imino-2-thiazoline hydrochloride in place ofthe 1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, there is obtained as the product1-imino-4,5,6,7-tetrabromo-3-(2N-methylethylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 7 above but using anequivalent amount of1-imino-4,5,6,7-tetrabromo-3-(2-N-methylethylamino-4-imino-2-thiazolin-5-yliene)isoindolinein the free-base form in place of1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline, there isobtained as the product a metal chelate pigment corresponding to FormulaIV in which Me is Cu; R, R₁, R₂ and R₃ are each Br; N═B is N(CH₃ )C₂ H₅; and An is Cl.

EXAMPLE 22

A. When equivalent amounts of5-chloro-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-di-t-butylamino-4-imino-2-thiazoline hydrochloride are substituted forthe 1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, in the procedure described in Example 9,part B above, there is obtained as the product1-imino-5-chloro-4,5,6,7-tetrahydro-3-(2-di-t-butylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride

B. Following the procedure described above in Example 8 but substitutingan equivalent amount of1-imino-5-chloro-4,5,6,7-tetrahydro-3-(2-di-t-butylamino-4-imino-2-thiazolin-5-ylidene)-isoindolinein the free-base form or the1-imino-3-(2,4-diimino-5thiazolidinylidene)isoindoline used in thatexample, there is obtained the metal chelate pigment which correspondsto Formula VI in which Me is Co; R₂ is Cl; R, R₁ and R₃ are eachhydrogen; N═B is N(t-C₄ H₉)₂ ; and An is Cl.

EXAMPLE 23

A. When equivalent amounts of 5-phenyl-1,3-diiminoisoindoline and2-di-n-hexylamino-4-imino-2-thiazoline hydrochloride are substituted forthe 1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, in the procedure described in Example 9,part B above, there is obtained as the product1-imino-5-phenyl-3-(2-di-n-hexylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above butusing an equivalent amount of1-imino-5-phenyl-3-(2-di-n-hexylamino-5-imino-2-thiazolin-5-ylidene)isoindolinein the form of the free base in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni, R₂ is C₆ H₅ ; R, R₁ and R₃ are eachhydrogen; N═B is N(n-C₆ H₁₃)₂ ; and An is Cl.

EXAMPLE 24

A. Proceeding in a manner similar to that described above in Example 3,part A but substituting an equivalent amount of4,7-difluoro-1,3-diiminoisoindoline for the1,3-diimino-4,5,6,7-tetrachloroisoindoline used in that example, thereis obtained1-imino-4,7-difluoro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate.

B. When an equivalent amount of 1-imino-4,7-difluoro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate is substituted for the1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate in the procedure described in Example 3, part B above, there isobtained as the product a metal chelate pigment corresponding to FormulaIII in which Me is Ni; Z is NH; R and R₃ are each F; R₁ and R₂ are eachhydrogen; and An is Cl.

EXAMPLE 25

A. Using a procedure similar to that described in Example 9, part Babove but substituting 4-methyl-5,6,7-triphenyl-1,3-diiminoisoindolineand 2-benzylamino-4-imino-2-thiazoline hydrochloride for the1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, there is obtained as the product1-imino-4-methyl-5,6,7-triphenyl-3-(2benzylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above butusing an equivalent amount of1-imino-4-methyl-5,6,7-triphenyl-3-(2-benzylamino-4-imino-2-thiazolin-5-ylidene)isoindolinein the free-base form in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni; R, R₁ and R₂ are each C₆ H₅ ; R₃ is CH₃ ;N═B is NH-CH₂ -C₆ H₅ ; and An is Cl.

EXAMPLE 26

A. When equivalent amounts of5,6-dimethoxy-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-(3-phenylpropylamino)-4-imino-2-thiazoline hydrochloride aresubstituted for the 4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2,4-diiminothiazoline hydrochloride respectively, in the proceduredescribed in Example 10, part A above, there is obtained as the product1-imino-5,6-dimethoxy-4,5,6,7-tetrahydro-3-[2-(3-phenylpropylamino)-4-imino-2-thiazolin-5-ylidene]isoindoline.

B. By substituting an equivalent amount of1-imino-5,6-dimethoxy-4,5,6,7-tetrahydro-3-[2-(3-phenylpropylamino)-4-imino-2-thiazolin-5-ylidene]isoindolinefor the 1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline in theprocedure described in Example 7 above, there is obtained the metalchelate pigment represented by Formula VI above wherein Me is Cu; R₁ andR₂ are each OCH₃ ; R and R₃ are each hydrogen; N═B is NH-(CH₂)₃ -C₆ H₅ ;and An is Cl.

EXAMPLE 27

A. Following the procedure described in Example 9, part B above butusing equivalent amount of 5,6-dichloro-1,3-diiminoisoindoline and2-(5-phenylpentylamino)-4-imino-2-thiazoline hydrochloride in place ofthe 1,3-diiminosioindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respctively, there is obtained as the product1-imino-5,6-dichloro-3-[2-(5-phenylpentylamino)-4-imino-2-thiazolin-5-ylidene[isoindolinehydrochloride.

B. When an equivalent amount of1-imino-5,6-dichloro-3-[2-(5-phenylpentylamino)-4-imino-2-thiazolin-5-ylidene]isoindolinein the form of the free base is substituted for the1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline in theprocedure described in Example 9, part C above, there is obtained as theproduct a metal chelate pigment corresponding to Formula IV in which Meis Ni; R₁ and R₂ are each Cl; R and R₃ are each hydrogen; N═B isNH-(CH₂)₅ -C₆ H₅ ; and An is Cl.

EXAMPLE 28

A. Following a procedure similar to that described in Example 4, part Aabove but substituting equivalent amounts of5,6-dimethyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and4-imino-2-thiazolidenethione for the 1,3-diiminoisoindoline and4-imino-2-thiazolidinone respectively, there is obtained as the product1-imino-5,6-dimethyl-4,5,6,7-tetrahydro-3-(2-thioxo-4-imino-5-thiazolidinylidene)isoindoline.

B. When an equivalent amount of1-imino-5,6-dimethyl-4,5,6,7-tetrahydro-3-(2-thioxo-4-imino-5-thiazolidinylidene)isoindolineis substituted for the1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline in the proceduredescribed in Example 7 above, there is obtained as the product a metalchelate pigment corresponding to Formula V in which Me is Cu; R₁ and R₂are each CH₃ ; R and R₃ are each hydrogen; Z is S; and An is Cl.

EXAMPLE 29

A. Following the procedure described in Example 9, part B above butusing equivalent amounts of 4,7-diethoxy-1,3-diiminoisoindoline and2-N-ethylanilino-4-imino-2-thiazoline hydrochloride in place of1,3-diiminosioindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, there is otained as the product1imino-4,7-diethoxy-3-(2-N-ethylanilino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. When an equivalent amount of1-imino-4,7-diethoxy-3-(2N-ethylanilino-4-imino-2-thiazolin-5-ylidene)isoindolinein the form of the free base is substituted for1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline in the proceduredescribed in Example 7 above, the product obtained is a metal chelatepigment corresponding to Formula IV in which Me is Cu; R and R₃ are eachOC₂ H₅ ; R₁ and R₂ are each hydrogen; N═B is N(C₂ H₅)C₆ H₅ ; and An isCl.

EXAMPLE 30

A. Employing a procedure similar to that described in Example 10, part Aabove, but substituting equivalent amounts of5-methyl-4-phenyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-N-butylanilino-4-imino-2-thiazoline hydrochloride for4,5,6,7-tetrahydro-1,3-diiminoisoindoline and 2,4-diiminothiazolidinehydrochloride respectively, there is obtained as the product1-imino-5-methyl-4-phenyl-4,5,6,7-tetrahydro-3-(2-N-butylanilino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. When an equivalent amount of1-imino-5-methyl-4-phenyl-4,5,6,7-tetrahydro-3-(2-N-butylanilino-4-imino-2-thiazolin-5-ylidene)isoindolinein the free-base form is substituted for the1-imino-4,5,6,7-tetrahydro-3-(2,4-diimino-5-thiazolidinylidene)-isoindolinein the procedure described in Example 10, part B above, there isobtained as the product a metal chelate pigment corresponding to FormulaVI in which Me is Ni; R and R₁ are each hydrogen; R₂ is methyl; R₃ isphenyl; N═B is N(C₄ H₉)C₆ H₅ ; and An is Cl.

EXAMPLE 31

A. Proceeding in a manner similar to that described above in Example 10,part A but substituting equivalent amounts of4-(p-chlorophenyl)-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-(p-ethylanilino)-4-imino-2-thiazoline hydrochloride for4,5,6,7-tetrahydro-1,3-diiminosioindoline and 2,4-diiminothiazolidinehydrochloride, there is obtained as the product1-imino-4-(p-chlorophenyl)-4,5,6,7-tetrahydro-3-[2-(p-ethylanilino)-4-imino-2-thiazolin-5-ylidene]isoindoline.

B. Following the procedure described in Example 10 part B above butusing an equivalent amount of1-imino-4-(p-chlorophenyl)-4,5,6,7-tetrahydro-3-[2-(p-ethylanilino)-4-imino-2-thiazolin-5-ylidene]isoindolinein place of the 1-imino-4,5,6,7-tetrahydro-3-(2,4-diimino-5-thiazolidinylidene)isoindoline, there is obtained as the product ametal chelate pigment corresponding to Formula VI in which Me is Ni; R₃is p-(Cl)C₆ H₄ ; R, R₁ and R₂ are each hydrogen; N═B is NH-p-(C₂ H₅)C₆H₄ ; and An is Cl.

EXAMPLE 32

A. When equivalent amounts of5-(2,4,5-trimethylphenyl)-1,3-diiminoisoindoline and2-dibenzylamino-4-imino-2-thiazoline hydrochloride are substituted forthe 1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride in the procedure described in Example 9, part B above,there is obtained as the product1-imino-5-(2,4,5-trimethylphenyl)-3-(2-dibenzylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above, butusing an equivalent amount of1-imino-5-(2,4,5-trimethylphenyl)-3-(2-dibenzylamino-4-imino-2-thiazolin-5-ylidene)-isoindolinein the free-base form in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni; R₂ is 2,4,5-(CH₃)₃ -C₆ H₂ ; R, R₁ and R₃are each hydrogen; N═B is N-(CH₂ C₆ H₅)₂ ; and An is Cl.

EXAMPLE 33

A. Proceeding in a manner similar to that described above in Example 4,part A, but substituting an equivalent amount of5-ethoxy-1,3-diiminoisoindoline for 1,3-diiminoisoindoline, there isobtained as the product1-imino-5-ethoxy-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline.

B. When an equivalent amount of1-imino-5-ethoxy-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline issubstituted for 1-imino-3-(2,4-diimino-5-thiazolidinyliden)isoindolinein the procedure described in Example 8 above, there is obtained as theproduct a metal chelate pigment corresponding to Formula III in which Meis Co; R₂ is OC₂ H₅ ; R, R₁ and R₃ are each hydrogen; Z is O; and An isCl.

EXAMPLE 34

A. Following the procedure described in Example 9, part B above, butusing equivalent amounts of7-ethoxy-4-methyl-5-phenyl-1,3-diiminoisoindoline and2-N-ethylbenzylamino-4-imino-2-thiazoline hydrochloride in place of1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, there is obtained as the product1-imino-7-ethoxy-4-methyl-5phenyl-3-(2-N-ethylbenzylamino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. When equivalent amounts of1-imino-7-ethoxy-4-methyl-5-phenyl-3-(2-N-ethylbenzylamino-4-imino-2-thiazoline-5-ylidene)isoindolinein the form of the free base and nickel (II) bromide trihydrate aresubstituted for the1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidine)isoindoline andnickel (II) chloride hexahydrate respectively, in the proceduredescribed in Example 9, part C above, there is obtained as the product ametal chelate pigment corresponding to Formula IV in which Me is Ni; Ris OC₂ H₅ ; R₁ is hydrogen; R₂ is C₆ H₅ ; R₃ is CH₃ ; N═B is N(C₂H₅)-CH₂ -C₆ H₅ ; and An is Br.

EXAMPLE 35

A. Employing a procedure similar to that described in Example 9, part Babove, but substituting equivalent amounts of4,5,7-trimethyl-1,3-diiminoisoindoline and2-(p-chloroanilino)-4-imino-2-thiazoline hydrochloride for1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, there is obtained as the product1-imino-4,5,7-trimethyl-3-[2-(p-chloroanilino)-4-imino-2-thiazolin-5-ylidene]isoindolinehydrochloride.

B. Followng the procedure described in Example 9, part C above but usingan equivalent amount of1-imino-4,5,7-trimetyl-3-[2-(p-chloroanilino)-4-imino-2-thiazolin-5-ylidene]isoindolinein the free-base form in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni; R, R₂ and R₃ are each CH₃ ; R₁ ishydrogen; N═B is NH-p-ClC₆ H₄ ; and An is Cl.

EXAMPLE 36

A. When equivalent amounts of4-(3,4-dimethoxyphenyl)-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-(o-methoxyanilino)-4-imino-2-thiazoline hydrochloride are substitutedfor the 4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2,4-diiminothiazolidine hydrochloride respectively, in the proceduredescribed in Example 10, part A above, there is obtained as the product1-imino-4-(3,4-dimethoxyphenyl)-4,5,6,7-tetrahydro-3-[2-(o-methoxyanilino)-4-imino-2-thiazolin-5-ylidene]isoindolinehydrochloride.

B. Following the procedure described in Example 10, part B above, butusing an equivalent amount of1-imino-4-(3,4-dimethoxyphenyl)-4,5,6,7-tetrahydro-3-[2-(o-methoxyanilino)-4-imino-2-thiazolin-5-ylidene]isoindolinehydrochloride in place of1-imino-4,5,6,7-tetrahydro-3-(2,4-diimino-5-thiazolidinylidene)isoindoline,there is obtained as the product a metal chelate pigment correspondingto Formula VI in which Me is Ni; R₃ is 3,4-(OCH₃)₂ -C₆ H₃ ; R, R₁ and R₂are each hydrogen; N═B is NH-o-(OCH₃)C₆ H₄ ; and An is Cl.

EXAMPLE 37

A. Following the procedure described in Example 10, part A above, butusing equivalent amounts of 4,5,7-triphenyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-N-methyl(p-bromobenzylamino)-4-imino-2-thiazoline hydrochloride inplace of 4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2,4-diiminothiazolidine hydrochloride respectively, there is obtained asthe product1-imino-4,5,7-triphenyl-4,5,6,7-tetrahydro-3-[2-N-methyl(p-bromobenzylamino)-4-imino-2-thiazolin-5-ylidene]isoindoline.

B. When an equivalent amount of1-imino-4,5,7-triphenyl-4,5,6,7-tetrahydro-3-[2-N-methyl(p-bromobenzylamino)-4-imino-2-thiazolin-5-ylidene]isoindolineis substituted for the1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline in theprocedure described above in Example 4, part B, there is obtained as theproduct a metal chelate pigment corresponding to Formula VI in which Meis Ni; R, R₂ and R₃ are each C₆ H₅ ; R₁ is hydrogen; N=B isN(CH₃)-p-BrC₆ H₄ CH₂ ; and An is OH.

EXAMPLE 38

A. Proceeding in a manner similar to that described above in Example 3,part A, but substituting an equivalent amount of5,6-dibromo-4,7-difluoro-1,3-diiminoisoindoline for 1-3,diimino-4,5,6,7-tetrachoroisoindoline, there is obtained as the product1-imino-5,6-dibromo-4,7-difluoro--difluoro-3-(2,4-diimino-5-thiazolidinylidene)isoindoline acetate.

B. Following the procedure described in Example 3, part B above, butusing an equivalent amount of1-imino-5,6-dibromo-4,7-difluoro-3-(2,4-diimino-5-thiazolidinylidene)isoindolinein the free-base form in place of1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindoline, there is obtained as the product a metal chelate pigmentcorresponding to Formula III in which Me is Ni; R and R₃ are each F R₁and R₂ are each Br; Z is NH; and An is Cl.

EXAMPLE 39

A. When equivalent amounts of4-(p-bromophenyl)-7-phenyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-pyrrolidino-4-imino-2-thiazoline hydrochloride are substituted for the4,5,6,7-tetrahydro-1,3-diiminoisoindoline and 2,4-diiminothiazolidinehydrochloride respectively, in the procedure described in Example 10,part A above, there is obtained as the product1-imino-4-(p-bromophenyl)-7-phenyl-4,5,6,7-tetrahydro-3-(2-pyrrolidino-4-imino-2-thiazolin-5-ylidene)isoindoline.

B. Following the procedure described in Example 10, part B above butusing an equivalent amount of 1-imino-4-(p-bromophenyl)-7-phenyl-4,5,6,7-tetrahydro-3-(2-pyrrolidino-4-imino-2-thiazolin-5-ylidene)isoindolinein place of1-imino-4,5,6,7-tetrahydro-3-(2,4-diimino-5-thiazolidinylidene)isoindoline,there is obtained as the product a metal chelate pigment correspondingto Formula VI in which Me is Ni; R is C₆ H₅ ; R₃ is p-BrC₆ H₄ ; R₁ andR₂ are each hydrogen; N=B is pyrrolidino; and An is Cl.

EXAMPLE 40

When an equivalent amount of 4-isopropyl-7-methyl-1,3-diiminoisoindolineis substituted for 1,3-diiminoisoindoline in the procedure described inExample 9, part B above, there is obtained as the product1-imino-4-isopropyl-7-methyl-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above, butusing an equivalent amount of1-imino-4-isopropyl-7-methy-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindolinein the form of its free base in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni; R is CH₃ ; R₁ and R₂ are each hydrogen; R₃is iso-C₃ H₇ ; N=B is piperidino; and An is Cl.

EXAMPLE 41

Proceeding in a manner similar to that described in Example 9, part Babove, but substituting 4,5-dipropyl-7-ethoxy-1,3-diiminoisoindoline and2-morpholino-4-imino-2-thiazoline hydrochloride in equivalent amountsfor 1,3-diiminoisoindoline and 2- piperidino-4-imino-2-thiazolinehydrochloride respectively, there is obtained as the product1-imino-4,5-dipropyl-7-ethoxy-3-(2-morpholino-4-imino-2-thiazolin-5-ylidene)isoindolinehydrochloride.

B. When an equivalent amount of1-imino-4,5-dipropyl-7-ethoxy-3-(2-morpholino-4-imino-2-thiazolin-5-ylidene)isoindolinein the free-base form is substituted for1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline in theprocedure described in Example 9, part C above, there is obtained as theproduct a metal chelate pigment corresponding to Formula IV in which Meis Ni; R is OC₂ H₅ ; R₁ is hydrogen; R₂ and R₃ are each C₃ H₇ ; N=B ismorpholino, and An is Cl.

EXAMPLE 42

A. Following the procedure described in Example 9, part B above butusing equivalent amounts of5-chloro-4,6,7-trifluoro-1,3-diiminoisoindoline and2-(2-methylpiperidino)-4-imino-2-thiazoline hydrochoride in place of1,3-diiminoisoindoline and 2-piperidino-4-imino-2-thiazolinehydrochloride respectively, there is obtained as the product1-imino-5-chloro-4,6,7-trifluoro-3-[2-(2-methylpiperidino)-4-imino-2-thiazolin-5-ylidene]isoindolinehydrochloride.

B. When an equivalent amount of1-imino-5-chloro-4,6,7-trifluoro-3-[2-(2-methylpiperidino)-4-imino-2-thiazolin-5-ylidene]isoindolinein its free-base form is substituted for the1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, inthe procedure described in Example 9, part C above, there is obtained asthe product a metal chelate pigment corresponding to Formula IV in whichMe is Ni; R, R₁ and R₃ are each F; R₂ is Cl; N=B is 2--(CH₃)--C₅ H₉ Hand An is Cl.

EXAMPLE 43

A. When equivalent amounts of 4,5,7-trimethoxy-1,3-diiminoisoindolineand 2-(3-ethypyrrolidino)-4-imino-2-thiazoline hydrochloride aresubstituted for the 1,3-diiminoisoindoline and2-piperidino-4-imino-2-thiazoline hydrochloride respectively, in theprocedure described in Example 9, part C above, there is obtained as theproduct1-imino-4,5,7-trimethoxy-3-[2-(3-ethylpyrrolidino)-4-imino-2-thiazolin-5-ylidene]isoindolinehydrochloride.

B. Following the procedure described in Example 9, part C above butusing an equivalent amount of1-imino-4,5,7-trimethoxy-3-[2-(3-ethylpyrrolidino)-4-imino-2-thiazolin-5-ylidene]isoindolinein its free-base form in place of1-imino-3-(2-piperidino-4-imino-2-thiazolin-5-ylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula IV in which Me is Ni; R, R₂ and R₃ are each OCH₃ ; R₁ ishydrogen; N=B is 2-(C₂ h₅)C₄ H₇ N; and An is Cl.

EXAMPLE 44

A. Proceeding in a manner similar to that described above in Example 10,part A, but substituting equivalent amounts of4-bromo-6-methyl-4,5,6,7-tetrahydro-1,3-diiminoisoindoline and2-(3-methylmorpholino)-4-imino-2-thiazoline hydrochloride for4,5,6,7-tetrahydro-1,3-diiminoisoindoline and 2,4 -diiminothiazolidinehydrochloride respectively, there is obtained as the product1-imino-4-bromo-6-methyl-4,5,6,7-tetrahydro-3-[2-(3-methylmorpholino)-4-imino-2-thiazolin-5-ylidene]isoindoline.

B. When an equivalent amount of1-imino-4-bromo-6-methyl-4,5,6,7-tetrahydro-3-[2-(3-methylmorpholino)-4-imino-2-thiazolin-5-ylidene]isoindolineis substituted for1-imino-4,5,6,7-tetrahydro-3-(2,4-diimino-5-thiazolidinylidene)isoindolinein the procedure described in Example 10, part B above, there isobtained as the product a metal chelate pigment corresponding to FormulaVI in which Me is Ni; R₁ is CH₃ ; R₃ is Br; R and R₂ are each hydrogen;N=B is 2-(CH₃)C₄ H₇ NO; and An is Cl.

EXAMPLE 45

A. When an equivalent amount of4,5,6,7-tetraphenyl-1,3-diiminoisoindoline is substituted for the1,3-diimino-4,5,6,7-tetrachloroisoindoline in the procedure described inExample 3, part A above, there is obtained as the product1-imino-4,5,6,7-tetraphenyl-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate.

B. Following the procedure described in Example 3, part B above butusing an equivalent amount of1-imino-4,5,6,7-tetraphenyl-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate in place of1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate, there is obtained as the product a metal chelate pigmentcorresponding to Formula III in which Me is Ni; R, R₁, R₂ and R₃ areeach C₆ H₅ ; Z is NH; and An is Cl.

EXAMPLE 46

This example is representative of one of the procedures employed for theevaluation of the novel pigments of this invention as coloring agentsfor coating compositions.

A mixture of two parts of the novel pigment obtained in Example 1, partC above, seven parts of an acrylic resin, four parts of xylol and 20parts of 1/16 inch diameter steel balls was charged into a containerwhich was placed in a mechanica shaker. Shaking was effected for 1 hour.The container was removed from the shaker and to the mixture there wasadded an additional 17 parts of the acrylic resin and an additional tenparts of xylol. The container was again placed in the shake and shakingwas effected for 15 minutes longer. The steel balls were removed fromthe mixture and portions of the composition, which containedapproximately five percent pigment, were coated on foil-covered paper.The cured acrylic coating was completely transparent and was of apleasing blue-red shade. The coating was then tested for light-fastnessunder accelerated conditions by exposing the coated foil-coveredspecimens to radiation from a carbon arc in a standard light-fasttesting appratus. After 300 hours of continuous exposure, there was noobservable loss in strength or shade.

EXAMPLE 47

The nove pigments of this invention were evaluated for use in preparingcoating compositions suitable for outdoor exposure, such as automobilefinishes. Representative of the method employed is the followingdescription of the preparation and testing of a "metallic" automobilefinish.

A pigment base was prepared by subjecting a mixture of 15.7 parts of thechelate pigment from Example 1, part C above, and 16.2 parts of acrylicresin dissolved in 24.6 parts of xylol to attrition in a steel ball mill(one-half inch balls) for 48 hours. To the milled mixture there was thenadded an additional 4.3 parts of acrylic resin dissolved in 26.2 partsof xylol. The pigment base, which contained 18 percent pigment wasincorporated in a coating composition containing 7.7 parts of thepigment base, 3.3 parts of a 30 percent aluminum paste, 19.5 parts ofacrylic resin, 15.2 parts of a melamine resin, 1.3 parts of butanol and35 parts of xylol. The resultant composition was sprayed onto primed 4 ×12 inch steel test panels and the coated panels were then placed in acuring oven at 30° F for 30 minutes. There was thus produced a pleasingblue-red transparent and glossy metallic finish on the test panels.

The coated panels were then tested by outdoor exposure in Florida andunder desert sun in Arizona. After twelve months of this continuousexposure there was essentially no perceptible change in the hue,brightness and strength of the pigment.

EXAMPLE 48

A. To 140 parts of 2-ethoxyethanol stirred at 100° C under an atmosphereof nitrogen there was added 8.6 parts of 60 percent active solid sodiumsulfide and the resultant solution was filtered to remove undissolvedmaterial. The filtrate was mixed with 94 parts of dimethylformamide and11.3 parts of 3,6-dimethoxy-phthalonitrile nd the mixture stirred at 25°C for a period of one hour. The reaction mixture was then heated to 95°C over a period of 1 hour, cooled to 25° C and filtered to removeundissolved material which was found to be (4.5 parts) unreacted3,6-dimethoxyphthalonitrile. The filtrate, which contained approximately0.04 mole of the sodium salt of4,7-dimethoxy-1-imino-3-mercaptoisoindoline was stirred and there asadded 10.7 parts of 2,4-diiminothiazolidinium benzenesulfonate. Stirringwas continued overnight at 25° C. The product which separated wascollected by filtration, washed successively with four portions of 12.0parts each of methyl alcohol and finally dried in vacuo to obtain 4.5parts of4,7-dimethoxy-1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline asa red solid which melted at 227°-246° C (dec).

B. To a stirred solution of 1.14 parts of zinc chloride in 37.6 parts ofdimethylformamide there was added 4.0 parts of4,7-dimethoxy-1-imino-3-(2,4-diimino-5-thiazolidinylidene)isindoline.Stirring was continued overnight at ambient temperature. The product wascollected by filtration, washed first with a small volume of freshdimethylformamide, then with acetone, and was finally dried in vacuo at50° C to obtain 3.1 parts of the zinc chloride adduct, a reddish-brownsolid which consisted of two moles of4,7-dimethoxy-1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindolineand one mole of zinc chloride.

Anal. Calcd. for C₂₆ H₂₆ N₁₀ O₄ S₂ · ZnCl₂ · 6H₂ O: C 36.69; H 4.50 N16.46; S 7.53; Zn 7.67; Cl 8.35. Found: C 37.77; H 3.67; N 16.16; S7.77; Zn 6.83; Cl 8.10.

C. To a stirred solution of 0.86 parts of nickel (II) chloridehexahydrate in 28.3 parts of dimethylformamide there was added at 25° C2.9 parts of the zinc chloride adduct of4,7-dimethoxy-1-imino-3-(2,4-dimino-5-thiazolidinylidene)isoindolinefrom B. The reaction mixture was heated to 100° C during a period of 1hour and maintained at 98°-100° C for a period of three hours. Thesuspended reddish-brown solid present in the reaction mixture was thencollected by filtration at 100° C, washed with warm dimethylformamide,then with water and finally dried in vacuo at 80° C to obtain 1.8 partsof the dark reddish-brown nickel chelate pigment represented by FormulaII where Me is Ni; Z is NH; R and R₃ are each OCH₃ ; R₁ and R₂ are eachhydrogen; and An is Cl.

Anal. Calcd. for C₂₆ H₂₃ N₉ NiO₄ S₂ · HCl · 3H₂ O: C 42.26; H 4.09; N17.06; S 8.68; Ni 7.95; Cl 4.80. Found: C 41.97; H 3.90; N 15.16; S5.16; Ni 8.81; Cl 5.29.

The thus obtained pigment was incorporated into an acrylic coatingformulation according to the procedure described in Example 46 above.When applied over foil-covered paper a pleasing transparent browncoating was obtained. When tested for light-fastness under acceleratedconditions by exposing the coated foil-covered specimen to radiationfrom a carbon arc in a standard light-fast testing apparatus, there wasno observable loss in strength or shade after 380 hours of continuousexposure.

EXAMPLE 49

A. When an equivalent amount of 5,6-diphenyl-1,3-diiminoisoindoline issubstituted for the 1,3-diiminoisoindoline used in the proceduredescribed in Example 1, part A above, there is obtained as the product1-imino-5,6-diphenyl-3-(2,4-diimino-5-thiazolidinylidene)isoindoline.

B. Following the procedure described in Example 7 above but using anequivalent amount of1-imino-5,6-diphenyl-3-(2,4-diimino-5-thiazolidinylidene)isoindoline inplace of 1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindoline, thereis obtained as the product a metal chelate pigment corresponding toFormula III in which Me is Cu; Z is NH; R₁ and R₂ are each C₆ H₅ ; R andR₃ are hydrogen; and An is Cl.

EXAMPLE 50

A. When an equivalent amount of 5-phenoxy-1,3-diiminoisoindoline issubstituted for the 1,3-diiminoisoindoline in the procedure described inExample 4, part A above, there is obtained as the product1-imino-5-phenoxy-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline.

B. Following the procedure described in Example 4, part B above butusing an equivalent amount of1-imino-5-phenoxy-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline inplace of 1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline,there is obtained as the product a metal chelate pigment correspondingto Formula III in which Me is Ni; R₂ is OC₆ H₅ ; R, R₁ and R₃ are eachhydrogen; Z is O; and An is OH.

EXAMPLE 51

A. Proceeding in a manner similar to that described above in Example 3,part A but substituting an equivalent amount of6,7-dichloro-1,3-diiminoisoindoline for the1,3-diimino-4,5,6,7-tetrachloroisoindoline used in that examaple, thereis obtained1-imino-6,7-dichloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate.

B When an equivalent amount of1-imino-6,7-dichloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate is substituted for the1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate in the procedure described in Example 3, part B above, there isobtained as the product a metal chelate pigment corresponding to FormulaIII in which Me is Ni; Z is NH; R and R₁ are each Cl; R₂ and R₃ are eachhydrogen; and An is Cl.

EXAMPLE 52

A. Proceeding in a manner similar to that described above in Example 4,part A, but substituting an equivalent amount of5-methoxy-1,3-diiminoisoindoline for 1,3-diiminoisoindoline, there isobtained as the product1-imino-5-methoxy-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline.

B. When an equivalent amount of1-imino-5-methoxy-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline issubstituted for 1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindolinein the procedure described in Example 8 above, there is obtained as theproduct a metal chelate pigment corresponding to Formula III in which Meis Co; R₂ is OCH₃ ; R, R₁ and R₃ are each hydrogen; Z is O; and An isCl.

EXAMPLE 53

A. Proceeding in a manner similar to that described above in Example 3,part A, but substituting an equivalent amount of5-(2',5'-dimethoxyphenyl)-1,3-diiminoisoindoline for1,3-diimino-4,5,6,7-tetrachloroisoindoline, there is obtained as theproduct1-imino-5-(2',5'-dimethoxyphenyl)-3-(2,4-diimino-5-thiazolidinylidene)isoindolineacetate.

B. Following the procedure described in Example 3, part B above, butusing an equivalent amount of1-imino-5-(2',5'-dimethoxyphenyl)-3-(2,4-diimino-5-thiazolidinylidene)isoindolinein the free-base form in place of1-imino-4,5,6,7-tetrachloro-3-(2,4-diimino-5-thiazolidinylidene)isoindoline,there is obtained as the product a metal chelate pigment correspondingto Formula III in which Me is Ni; R₂ is 2,5-(OCH₃)₂ C₆ H₃ ; R, R₁ and R₃are each hydrogen; Z is NH; and An is Cl.

EXAMPLE 54

A. Proceeding in a manner similar to that described above in Example 4,part A, but substituting an equivalent amount of5-chloro-1,3-diiminoisoindoline for 1,3-diiminoisoindoline, there isobtained as the product1-imino-5-chloro-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline.

B. When an equivalent amount of1-imino-5-chloro-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline issubstituted for 1-imino-3-(2,4-diimino-5-thiazolidinylidene)isoindolinein the procedure described in Example 8 above, there is obtained as theproduct a metal chelate pigment corresponding to Formula III in which Meis Co; R₂ is Cl; R, R₁ and R₃ are each hydrogen; Z is O; and An is Cl.

EXAMPLE 55

A. When an equivalent amount of 7-chloro-1,3-diiminoisoindoline issubstituted for the 1,3-diiminoisoindoline in the procedure described inExample 4, part A above, there is obtained as the product1-imino-7-chloro-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline.

B. Following the procedure described in Example 4, part B above butusing an equivalent amount of1-imino-7-chloro-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline inplace of 1-imino-3-(2-oxo-4-imino-5-thiazolidinylidene)isoindoline, isobtained as the product a metal chelate pigment corresponding to FormulaIII in which Me is Ni; R is Cl; R₁, R₂ and R₃ are each hydrogen; Z is O;and An is OH.

We claim:
 1. A compound of the formula ##STR43## wherein: A is adivalent radical combining with the --C═C-- portion of the molecule towhich it is attached to form a six-membered carbocyclic ring and isselected from the group consisting of ##STR44## where in each instanceC(7) and C(4) are bonded to C(7a) and C(3a) respectively, and in whichR, R₁, R₂ and R₃ are the sam or different and are selected from theclass consisting of hydrogen, alkyl having one to three carbon atoms,alkoxy having one to three carbon atoms, halo, trifluoromethyl, phenyland phenyl substituted by alkyl having one to three carbon atoms, alkoxyhaving one to three carbon atoms and halogen; andY is a divalent radicalcombining with the --S--C--C-- portion of the molecule to form afive-membered heterocyclic ring having the same orientation as athiazole ring and is ##STR45## in which N═B is di-lower-alkylamino,piperidino, pyrrolidino, morpholino, (lower-alkyl)-(phenyl)-amino or(lower-alkyl)-(phenyl-lower-alkyl)amino.
 2. A compound according toclaim 1 wherein A is ##STR46## or the formula ##STR47## in which R, R₁,R₂ and R₃ are the same or different and are selected from the classconsisting of hydrogen, alkyl having one to three carbon atoms, alkoxyhaving one to three carbon atoms, halo, trifluoromethyl, phenyl andphenyl substituted by alkyl having one to three carbon atoms, alkoxyhaving one to three carbon atoms and halogen; and N═B islower-alkylamino, di-lower-alkylamino, piperidino, pyrrolidino,morpholino, phenylamino, (lower-alkyl)-(phenyl)-amino,phenyl-lower-alkylamino or (lower-alkyl)-(phenyl-lower-alkyl)amino. 3.The compound according to claim 2 wherein R, R₁, R₂ and R₃ are eachhydrogen and N═B is piperidino.
 4. A compound according to claim 1wherein A is ##STR48## of the formula ##STR49## in which R, R₁, R₂ andR₃ are the same or different and are selected from the class consistingof hydrogen, alkyl having one to three carbon atoms, alkoxy having oneto three carbon atoms, halo, trifluoromethyl, phenyl and phenylsubstituted by alkyl having one to three carbon atoms, alkoxy having oneto three carbon atoms and halogen; and N═B is lower-alkylamino,di-lower-alkylamino, piperidino, pyrrolidino, morpholino, phenylamino,(lower-alkyl)-(phenyl)amino, phenyl-lower-alkylamino or(lower-alkyl)-(phenyl-lower-alkyl)amino.